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Simplifying
7x2 + 8 = 99
Reorder the terms:
8 + 7x2 = 99
Solving
8 + 7x2 = 99
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-8' to each side of the equation.
8 + -8 + 7x2 = 99 + -8
Combine like terms: 8 + -8 = 0
0 + 7x2 = 99 + -8
7x2 = 99 + -8
Combine like terms: 99 + -8 = 91
7x2 = 91
Divide each side by '7'.
x2 = 13
Simplifying
x2 = 13
Take the square root of each side:
x = {-3.605551275, 3.605551275}
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